This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 211 |
| 3 | 220 |
| 4 | 235 |
| 5 | 20403 |
| 6 | 111416 |
| 7 | 1011231 |
| 8 | 3444142 |
| 9 | 10003400 |
| 10 | 22303600 |
| 11 | 31151021 |
| 12 | 53231032 |
| 13 | 121542025 |
| 14 | 126423126 |
| 15 | 202032110 |
| 16 | 243425212 |
| 17 | 302434003 |
| 18 | 311544033 |
| 19 | 324231521 |
| 20 | 334130241 |
| 21 | 375607602 |
| 22 | 406221650 |
| 23 | 561620561 |
| 24 | 662033363 |
| 25 | 1053045074 |